In which layer do auroral meteors appear? Why is there auroras in Mohe, which is not in the Arctic Circle?

Many people have seen the beauty of the aurora through movies, TV shows and photography exhibitions, and secretly wished to see it once in their lifetime. The aurora can be said to be an enlarged and cooler version of the rainbow, which is very magnificent. The aurora appears over the high magnetic latitudes of the planet. It is a colorful luminous phenomenon. There are three conditions for the aurora to be produced: atmosphere, magnetic field, and high-energy charged particles. If you are interested, please join the discussion!

Contents of this article

1. On which layer do auroral meteors appear?

2. Why is there aurora in Mohe, which is not in the Arctic Circle?

3. When the Aurora appears

On which layer do auroral meteors appear?

Auroral meteors appear in the ionosphere and the exosphere. Auroras often appear in the sky above areas close to the geomagnetic poles. They are generally in the shape of bands, arcs, curtains, or radials. These shapes are sometimes stable and sometimes change continuously. Auroras can be divided into two types according to their properties: diffuse auroras and discrete auroras.

The entire Earth's atmosphere above 60 kilometers is in a state of partial or full ionization. The ionosphere is the partially ionized atmospheric region, and the fully ionized atmospheric region is called the magnetosphere.

According to research on the distribution of the aurora, the shape of the aurora zone is not a ring centered on the geomagnetic pole, but an oval, and the spectral lines of the aurora range from about 3100 to 6700 angstroms.

The aurora appears in the sky above the high magnetic latitudes of the planet. It is a colorful luminous phenomenon. There are three conditions for the production of the aurora: atmosphere, magnetic field, and high-energy charged particles.

Why is there aurora in Mohe, which is not in the Arctic Circle?

When polar day appears at the Arctic Circle, polar day will also occur about 18 degrees south of the Arctic Circle. This is because of the refraction of light. The aurora can be seen in Mohe because light will refract when it propagates through the atmosphere.

Refraction refers to the phenomenon that when light is incident from one medium (such as water) to a second medium (such as air) at an angle, part of the light deviates from the original path at the interface and forms an angle with the original path. The refracted light is located in the plane determined by the incident light and the interface normal.

Aurora appearance time

Many people have seen the beauty of the aurora through movies, TV shows and photography exhibitions, and secretly wished to see it once in their lifetime. The aurora can be said to be an enlarged and cooler version of the rainbow, which is very magnificent. The aurora usually appears from November to March in the second half of the year, and the best time is also very long, from 10 pm to 3 am the next morning. In general, the aurora has little to do with the season, and it is not only in winter. However, generally speaking, in the summer in high-latitude areas, there is usually polar day, not to mention the aurora. It should be noted that the colder the weather and the cleaner the air, the clearer and more charming the aurora will be.